French

I am sitting for my final HSC French speaking exam (final year of school exams in Sydney, Australia) and I am putting in a claim for illness/misadventure as i've been quite ill in the last week. I think I may have to describe it any I was wondering if anyone had any ideas:
I've had problems with my sinuses, which has caused me to have to shocking headache, nausea and general feelings of being ill.
Thanks!